Jan-Lennard Struff

Struff advanced to his first semifinals on the ATP Tour in Marseille, Munich and Metz. He entered the top 50 in the ATP rankings for the first time in his career and finished the year in the top 100 also for the first time at World No. 59.{{Cite web|url=https://www.atptour.com/en/players/jan-lennard-struff/sl28/bio|title=Jan-Lennard Struff - Bio - Year By Year|publisher=ATP World|access-date=4 October 2018|archive-date=14 February 2021|archive-url=https://web.archive.org/web/20210214105332/https://www.atptour.com/en/players/jan-lennard-struff/sl28/bio|url-status=live}}

Struff made his Davis Cup debut for Germany against France in the first round. He lost the first rubber to Gilles Simon with 8–10 in the fifth set, and his team lost the tie with 2–3.

Struff reached the third round of the Paris Masters as a qualifier, his best showing at the Masters 1000 level thus far, after beating world No. 3 Stan Wawrinka, saving a match point.

Struff reached the semifinals of both Winston-Salem and St. Petersburg.

Struff got to the semifinals in the Australian Open men's doubles in partnership with Ben McLachlan, including a win over the No. 1 seeds Łukasz Kubot and Marcelo Melo.{{cite web|url=https://www.atpworldtour.com/en/news/mclachlan-struff-australian-open-2018-tuesday|title=Mclachlan/Struff Stun Top Seeds|publisher=ATP World Tour|date=23 January 2018|access-date=29 January 2018|archive-date=7 July 2018|archive-url=https://web.archive.org/web/20180707230354/https://www.atpworldtour.com/en/news/mclachlan-struff-australian-open-2018-tuesday|url-status=live}}

At the 2018 Wimbledon Championships, he reached the quarterfinals in doubles, also partnering with McLachlan, where they lost to the wildcard pair of Frederik Nielsen and Joe Salisbury.

In Tokyo, Struff defeated Marin Čilić and had a match point in the second set of his quarterfinal encounter against Denis Shapovalov. At the same tournament, he won the first title of his career in doubles, partnering again with McLachlan.{{cite web|url=https://www.atptour.com/en/news/tokyo-2018-doubles-final|title=Struff/McLachlan Triumph In Tokyo For First Team Title|publisher=ATP World Tour|date=7 October 2018|access-date=22 July 2021|archive-date=22 July 2021|archive-url=https://web.archive.org/web/20210722051011/https://www.atptour.com/en/news/tokyo-2018-doubles-final|url-status=live}}

File:Struff RG19 (51) (48199018591).jpg

Struff started his 2019 season at the Brisbane International. He lost in the first round to Jérémy Chardy.{{cite news |title=Andy Murray upbeat after winning start in Brisbane International |url=https://www.hindustantimes.com/tennis/andy-murray-upbeat-after-winning-start-in-brisbane-international/story-wlSAWMf8Ux70qLR61VmrSN.html |access-date=15 July 2022 |publisher=www.hindustantimes.com |date=1 January 2019 |archive-date=15 July 2022 |archive-url=https://web.archive.org/web/20220715093659/https://www.hindustantimes.com/tennis/andy-murray-upbeat-after-winning-start-in-brisbane-international/story-wlSAWMf8Ux70qLR61VmrSN.html |url-status=live }} At the ASB Classic in Auckland, he upset fourth seed and world No. 24, Pablo Carreño Busta, in the quarterfinals.{{cite news |last1=Long |first1=David |title=ASB Classic's fourth seed Pablo Carreno Busta loses to Jan-Lennard Struff in epic |url=https://www.stuff.co.nz/sport/tennis/109857110/asb-classics-fourth-seed-pablo-carreno-busta-loses-to-janlennard-struff-in-epic |access-date=5 December 2022 |publisher=www.stuff.co.nz |date=10 January 2019 |archive-date=4 April 2023 |archive-url=https://web.archive.org/web/20230404010311/https://www.stuff.co.nz/sport/tennis/109857110/asb-classics-fourth-seed-pablo-carreno-busta-loses-to-janlennard-struff-in-epic |url-status=live }} He was defeated in the semifinals by British wildcard Cameron Norrie.{{cite news |title=Cameron Norrie through to first ATP Tour final in hometown Auckland |url=https://www.espn.com/tennis/story/_/id/25733722/cameron-norrie-first-atp-tour-final-hometown-auckland |access-date=15 July 2022 |work=www.espn.com |date=11 January 2019 |archive-date=15 July 2022 |archive-url=https://web.archive.org/web/20220715094658/https://www.espn.com/tennis/story/_/id/25733722/cameron-norrie-first-atp-tour-final-hometown-auckland |url-status=live }} However, in doubles, he and his partner, Ben McLachlan, won the title, beating Raven Klaasen and Michael Venus in the final.{{cite news |title=From Ballboy To Champ: McLachlan Wins Auckland With Struff |url=https://www.atptour.com/en/news/mclachlan-struff-win-auckland-2019-title |access-date=5 December 2022 |publisher=www.atptour.com |date=12 January 2019 |archive-date=13 January 2019 |archive-url=https://web.archive.org/web/20190113122429/https://www.atptour.com/en/news/mclachlan-struff-win-auckland-2019-title |url-status=live }} Ranked 51 at the Australian Open, he lost in the first round to Australian Matthew Ebden in four sets.{{cite news |title=Kastles Australian Open 2019: Frances Tiafoe Cruises into Second Round of Men's Singles |url=https://washingtonkastles.com/2019/01/14/kastles-australian-open-2019-frances-tiafoe-cruises-into-second-round-of-men-s-singles/ |access-date=5 December 2022 |publisher=washingtonkastles.com |date=14 January 2019 |archive-date=31 January 2023 |archive-url=https://web.archive.org/web/20230131173007/https://washingtonkastles.com/2019/01/14/kastles-australian-open-2019-frances-tiafoe-cruises-into-second-round-of-men-s-singles/ |url-status=live }}

In February, Struff competed at the Sofia Open. He lost in the second round to second seed and world No. 12, Stefanos Tsitsipas.{{cite news |title=Tsitsipas made to work for win over Struff in Sofia |url=https://tennismash.com/2019/02/08/tsitsipas-beats-struff-sofia-open/ |access-date=5 December 2022 |publisher=tennismash.com |date=8 February 2019 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205140443/https://tennismash.com/2019/02/08/tsitsipas-beats-struff-sofia-open/ |url-status=live }} In Rotterdam, he fell in the first round of qualifying to Dutch wildcard Ryan Nijboer. At the Dubai Championships, he stunned seventh seed and world No. 14, Milos Raonic, in the first round.{{cite news |title=Canada's Milos Raonic loses first-round match to unseeded opponent in Dubai |url=https://www.sportsnet.ca/tennis/canadas-milos-raonic-loses-first-round-match-unseeded-opponent-dubai/ |access-date=5 December 2022 |publisher=www.sportsnet.ca |date=25 February 2019 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205143213/https://www.sportsnet.ca/tennis/canadas-milos-raonic-loses-first-round-match-unseeded-opponent-dubai/ |url-status=live }} He was defeated in the second round by Márton Fucsovics.{{cite news |title=Federer Makes Quarter Finals in Dubai |url=https://www.perfect-tennis.com/federer-makes-quarter-finals-in-dubai/ |access-date=5 December 2022 |publisher=www.perfect-tennis.com |date=27 February 2019 |archive-date=6 July 2022 |archive-url=https://web.archive.org/web/20220706104902/https://www.perfect-tennis.com/federer-makes-quarter-finals-in-dubai/ |url-status=live }} In doubles, he and Ben McLachlan reached the final where they lost to Joe Salisbury and Rajeev Ram.{{cite news |title=Rajeev Ram and Joe Salisbury Win Their First Team Title At The Dubai Duty Free Tennis Championships |url=https://dubaidutyfreetennischampionships.com/2019-mens-doubles-final-salisbury-ram-mclachlan-struff/ |access-date=5 December 2022 |publisher=dubaidutyfreetennischampionships.com |date=2 March 2019 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205150132/https://dubaidutyfreetennischampionships.com/2019-mens-doubles-final-salisbury-ram-mclachlan-struff/ |url-status=live }} At the Indian Wells Masters, he upset world No. 3 and compatriot, Alexander Zverev, in the third round.{{cite news |title=Struff Topples Zverev For Second Top 5 Win |url=https://www.atptour.com/en/news/struff-stuns-zverev-indian-wells-2019-monday |access-date=5 December 2022 |publisher=www.atptour.com |date=11 March 2019 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205143843/https://www.atptour.com/en/news/struff-stuns-zverev-indian-wells-2019-monday |url-status=live }} He was eliminated from the tournament in the fourth round by 13th seed and world No. 14, Milos Raonic.{{cite news |last1=DONALDSON |first1=JEFF |title=Raonic eases past Struff to set Kecmanovic quarterfinal |url=https://bnpparibasopen.com/news/raonic-eases-past-struff-to-set-kecmanovic-quarterfinal/ |access-date=5 December 2022 |publisher=bnpparibasopen.com |date=13 March 2019 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205144514/https://bnpparibasopen.com/news/raonic-eases-past-struff-to-set-kecmanovic-quarterfinal/ |url-status=live }} In Miami, he lost in the first round to American qualifier Reilly Opelka.

Struff started his clay-court season at the Monte-Carlo Masters. He upset 15th seed and world No. 20, Denis Shapovalov, in the first round.{{cite news |title=Struff Shines Against Shapovalov In Monte-Carlo |url=https://www.atptour.com/en/news/struff-shapovalov-monte-carlo-2019-monday |access-date=5 December 2022 |publisher=www.atptour.com |date=15 April 2019 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205151754/https://www.atptour.com/en/news/struff-shapovalov-monte-carlo-2019-monday |url-status=live }} He lost in the second round to Grigor Dimitrov.{{cite news |title=Canadian Felix Auger-Aliassime out of Monte-Carlo Masters |url=https://www.cbc.ca/sports/tennis/canadian-felix-auger-aliassime-out-of-monte-carlo-masters-1.5101596 |access-date=5 December 2022 |publisher=www.cbc.ca |date=17 April 2019 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205152234/https://www.cbc.ca/sports/tennis/canadian-felix-auger-aliassime-out-of-monte-carlo-masters-1.5101596 |url-status=live }} In Barcelona, he beat 10th seed and world No. 22, David Goffin, in the second round.{{cite news |last1=Sharma |first1=Rik |title=Tennis: Lucky loser Jarry stuns Alexander Zverev in Barcelona Open |url=https://www.reuters.com/article/us-tennis-barcelona/tennis-lucky-loser-jarry-stuns-alexander-zverev-in-barcelona-open-idUSKCN1RZ1X9 |access-date=5 December 2022 |publisher=www.reuters.com |date=23 April 2019 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205152947/https://www.reuters.com/article/us-tennis-barcelona/tennis-lucky-loser-jarry-stuns-alexander-zverev-in-barcelona-open-idUSKCN1RZ1X9 |url-status=live }} He upset fifth seed and world No. 8, Stefanos Tsitsipas, in the third round for his second Top 10 win of the season.{{cite news |last1=Hammond |first1=Cale |title=Struff's second Top 10 win of 2019 denies Tsitsipas-Nadal quarterfinal |url=https://www.tennis.com/news/articles/struff-s-second-top-10-win-of-2019-denies-tsitsipas-nadal-quarterfinal |access-date=5 December 2022 |publisher=www.tennis.com |date=25 April 2019 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205153506/https://www.tennis.com/news/articles/struff-s-second-top-10-win-of-2019-denies-tsitsipas-nadal-quarterfinal |url-status=live }} He was defeated in his quarterfinal match by top seed, world No. 2, and eleven-time champion, Rafael Nadal.{{cite news |last1=Ilic |first1=Jovica |title=ATP Barcelona: Rafael Nadal overpowers Jan-Lennard Struff to reach semis |url=https://www.tennisworldusa.org/tennis/news/On_the_ATP_results_with/69792/atp-barcelona-rafael-nadal-overpowers-janlennard-struff-to-reach-semis/ |access-date=5 December 2022 |publisher=www.tennisworldusa.org |date=26 April 2019 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205154158/https://www.tennisworldusa.org/tennis/news/On_the_ATP_results_with/69792/atp-barcelona-rafael-nadal-overpowers-janlennard-struff-to-reach-semis/ |url-status=live }} At the BMW Open in Munich, he lost in the first round to Brazilian qualifier Thiago Monteiro.{{cite news |title=No. 82nd-ranked Kudla upsets fifth-seeded Edmund in Munich opener |url=https://www.tennis.com/news/articles/no-82nd-ranked-kudla-upsets-fifth-seeded-edmund-in-munich-opener |access-date=5 December 2022 |publisher=www.tennis.com |date=30 April 2019 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205160142/https://www.tennis.com/news/articles/no-82nd-ranked-kudla-upsets-fifth-seeded-edmund-in-munich-opener |url-status=live }} In Madrid, he was defeated in the second round by ninth seed Marin Čilić. At the Italian Open, he upset ninth seed and world No. 10, Marin Čilić, in the second round.{{cite news |last1=Graham |first1=Michael |title=Novak Djokovic and Juan Martin del Potro cruise into third round of Italian Open |url=https://www.tennis365.com/atp-tour/novak-djokovic-and-juan-martin-del-potro-cruise-into-third-round-of-italian-open/ |access-date=11 December 2022 |publisher=www.tennis365.com |date=16 May 2019 |archive-date=11 December 2022 |archive-url=https://web.archive.org/web/20221211204852/https://www.tennis365.com/atp-tour/novak-djokovic-and-juan-martin-del-potro-cruise-into-third-round-of-italian-open/ |url-status=live }} He was eliminated in the third round by world No. 6 Kei Nishikori.{{cite news |title=Nadal, Federer, Djokovic Reach QF: Relive Manic Thursday In Rome |url=https://www.atptour.com/en/news/federer-nadal-djokovic-rome-2019-thursday-as-it-happens |access-date=12 December 2022 |publisher=www.atptour.com |date=16 May 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212124651/https://www.atptour.com/en/news/federer-nadal-djokovic-rome-2019-thursday-as-it-happens |url-status=live }} Ranked 45 at the French Open, he upset 20th seed and world No. 24, Denis Shapovalov, in the first round.{{cite news |title=Canada's Shapovalov loses French Open first-round match to Struff |url=https://www.sportsnet.ca/tennis/canadas-shapovalov-loses-french-open-first-round-match-struff/ |access-date=12 December 2022 |publisher=www.sportsnet.ca |date=27 May 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212130053/https://www.sportsnet.ca/tennis/canadas-shapovalov-loses-french-open-first-round-match-struff/ |url-status=live }} In the third round, he upset 13th seed and world No. 15, Borna Ćorić, in a third round thriller which lasted four-hour-22-minutes.{{cite news |last1=Rajagopalan |first1=Sharada |title=Struff Battles Past Coric To Reach Roland Garros Fourth Round For The First Time |url=https://www.tennis-tourtalk.com/44574/struff-battles-past-coric-to-reach-roland-garros-fourth-round-for-the-first-time |access-date=12 December 2022 |publisher=www.tennis-tourtalk.com |date=1 June 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212131040/https://www.tennis-tourtalk.com/44574/struff-battles-past-coric-to-reach-roland-garros-fourth-round-for-the-first-time |url-status=live }} With his third round victory over Ćorić, he reached the fourth round for the first time. He fell in his fourth-round match to world No. 1, Novak Djokovic.{{cite news |last1=Jurejko |first1=Jonathan |title=French Open 2019: Novak Djokovic beats Jan-Lennard Struff to move into quarter-finals |url=https://www.bbc.com/sport/tennis/48500993 |access-date=12 December 2022 |publisher=www.bbc.com |date=3 June 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212131037/https://www.bbc.com/sport/tennis/48500993 |url-status=live }}

Struff started his grass-court season at the Stuttgart Open. He beat eighth seed and world No. 25, Denis Shapovalov, in the first round.{{cite news |title=Canadians experience mixed results at Stuttgart Open |url=https://www.thestar.com/sports/tennis/2019/06/11/canadians-experience-mixed-results-at-stuttgart-open.html |access-date=12 December 2022 |work=www.thestar.com |date=11 June 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212132223/https://www.thestar.com/sports/tennis/2019/06/11/canadians-experience-mixed-results-at-stuttgart-open.html |url-status=live }} He reached the semifinals where he lost to Matteo Berrettini.{{cite news |title=Auger-Aliassime reaches Stuttgart Open final after Raonic withdraws |url=https://www.sportsnet.ca/tennis/auger-aliassime-reaches-stuttgart-open-final-raonic-withdraws/ |access-date=12 December 2022 |publisher=www.sportsnet.ca |date=15 June 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212132223/https://www.sportsnet.ca/tennis/auger-aliassime-reaches-stuttgart-open-final-raonic-withdraws/ |url-status=live }} In Halle, he was defeated in the second round by third seed and world No. 9, Karen Khachanov.{{cite news |title=Khachanov Wins Battle Of Big Hitters In Halle |url=https://www.atptour.com/en/news/khachanov-goffin-halle-2019-wednesday |access-date=12 December 2022 |publisher=www.atptour.com |date=19 June 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212132223/https://www.atptour.com/en/news/khachanov-goffin-halle-2019-wednesday |url-status=live }} Seeded 33rd at Wimbledon, he made it to the third round, where he lost to Mikhail Kukushkin.{{cite news |title=Nishikori To Play Kukushkin In Wimbledon Fourth Round; Japanese Star Records 400th Match Win |url=https://www.atptour.com/en/news/nishikori-struff-kukushkin-wimbledon-2019-saturday |access-date=12 December 2022 |publisher=www.atptour.com |date=6 July 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212132843/https://www.atptour.com/en/news/nishikori-struff-kukushkin-wimbledon-2019-saturday |url-status=live }}

Seeded seventh at the Hamburg Open, Struff lost in the second round to Pablo Carreño Busta.{{cite news |title=After reaching Hamburg quarters, Zverev splits with coach Ivan Lendl |url=https://www.tennis.com/news/articles/after-reaching-hamburg-quarters-zverev-splits-with-coach-ivan-lendl |access-date=12 December 2022 |publisher=www.tennis.com |date=25 July 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212133413/https://www.tennis.com/news/articles/after-reaching-hamburg-quarters-zverev-splits-with-coach-ivan-lendl |url-status=live }}

Seeded 14th at the Citi Open, Struff lost in the second round to Jordan Thompson.{{cite news |title=Tsitsipas, Kyrgios into last 16 in Washington |url=https://www.tennismajors.com/atp/tsitsipas-kyrgios-into-last-16-in-washington-1760.html |access-date=12 December 2022 |publisher=www.tennismajors.com |date=1 August 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212133956/https://www.tennismajors.com/atp/tsitsipas-kyrgios-into-last-16-in-washington-1760.html |url-status=live }} At the Rogers Cup in Montreal, he was defeated in the second round by 13th seed and world No. 17, Nikoloz Basilashvili.{{cite news |title=Felix Auger-Aliassime tops Vasek Pospisil in all-Canadian showdown at Rogers Cup |url=https://cfjctoday.com/2019/08/08/felix-auger-aliassime-tops-vasek-pospisil-in-all-canadian-showdown-at-rogers-cup/ |access-date=12 December 2022 |publisher=cfjctoday.com |date=8 August 2019 |archive-date=5 October 2023 |archive-url=https://web.archive.org/web/20231005013203/https://cfjctoday.com/2019/08/08/felix-auger-aliassime-tops-vasek-pospisil-in-all-canadian-showdown-at-rogers-cup/ |url-status=live }} In Cincinnati, he stunned fifth seed and world No. 7, Stefanos Tsitsipas, in the second round in a tight three-set match.{{cite news |title=Struff Hangs Tough To Upset Tsitsipas; Medvedev Next In Cincinnati |url=https://www.atptour.com/en/news/stuff-tsitsipas-medvedev-cincinnati-2019-wednesday |access-date=12 December 2022 |publisher=www.atptour.com |date=14 August 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212143409/https://www.atptour.com/en/news/stuff-tsitsipas-medvedev-cincinnati-2019-wednesday |url-status=live }} He lost in the third round to ninth seed and world No. 8, and eventual champion, Daniil Medvedev.{{cite news |title=In-Form Medvedev Rolls Past Struff In Cincinnati |url=https://www.atptour.com/en/news/medvedev-struff-federer-cincinnati-2019-thursday |access-date=12 December 2022 |publisher=www.atptour.com |date=15 August 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212143405/https://www.atptour.com/en/news/medvedev-struff-federer-cincinnati-2019-thursday |url-status=live }} Ranked 37 at the US Open, he was beaten in the second round by world No. 14 John Isner.{{cite news |last1=Borden |first1=Jeremy |title=American John Isner cruises to second-round win over Jan-Lennard Struff |url=https://www.usopen.org/en_US/news/articles/2019-08-29/american_john_isner_cruises_to_secondround_win_over_janlennard_struff.html |access-date=12 December 2022 |publisher=www.usopen.org |date=29 August 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212144259/https://www.usopen.org/en_US/news/articles/2019-08-29/american_john_isner_cruises_to_secondround_win_over_janlennard_struff.html |url-status=live }}

Seeded eighth at the Moselle Open, Struff lost in the first round to Pierre-Hugues Herbert.{{cite news |title=Tsonga back to winning ways in Metz, Donskoy sets up Medvedev date |url=https://sportstar.thehindu.com/tennis/tsonga-moselle-open-donskoy-vs-medvedev-st-petersburg-open/article64891395.ece |access-date=12 December 2022 |publisher=sportstar.thehindu.com |date=18 September 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212145110/https://sportstar.thehindu.com/tennis/tsonga-moselle-open-donskoy-vs-medvedev-st-petersburg-open/article64891395.ece |url-status=live }} In Tokyo, he was defeated in the first round by Japanese wildcard Go Soeda.{{cite news |last1=Eichenholz |first1=Andrew |title=Lucky 13: Soeda Shining In Tokyo |url=https://www.atptour.com/en/news/soeda-tokyo-2019-feature |access-date=12 December 2022 |publisher=www.atptour.com |date=1 October 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212161613/https://www.atptour.com/en/news/soeda-tokyo-2019-feature |url-status=live }} At the Shanghai Masters, he was eliminated from the tournament in the first round by 11th seed and world No. 13, Matteo Berrettini.{{cite news |last1=HEGDE |first1=PRAJWAL |title=Roger Federer wins Shanghai Masters opener |url=https://timesofindia.indiatimes.com/sports/tennis/top-stories/roger-federer-wins-shanghai-masters-opener/articleshow/71491849.cms |access-date=12 December 2022 |publisher=timesofindia.indiatimes.com |date=8 October 2019 |archive-date=12 December 2022 |archive-url=https://web.archive.org/web/20221212162615/https://timesofindia.indiatimes.com/sports/tennis/top-stories/roger-federer-wins-shanghai-masters-opener/articleshow/71491849.cms |url-status=live }} Seeded seventh at the European Open, he lost in the second round to Frances Tiafoe.{{cite news |title=Former world No. 1 Murray into Antwerp quarterfinals; top 3 seeds out |url=https://www.tennis.com/news/articles/former-world-no-1-murray-into-antwerp-quarterfinals-top-3-seeds-out |access-date=13 December 2022 |publisher=www.tennis.com |date=17 October 2019 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213132235/https://www.tennis.com/news/articles/former-world-no-1-murray-into-antwerp-quarterfinals-top-3-seeds-out |url-status=live }} At the Swiss Indoors, he reached the quarterfinals where he was defeated by eventual finalist Alex de Minaur.{{cite news |title=De Minaur guaranteed career-high ranking after storming into Swiss Indoor semis |url=https://www.smh.com.au/sport/tennis/de-minaur-guaranteed-career-high-ranking-after-storming-into-swiss-indoor-semis-20191026-p534gl.html |access-date=13 December 2022 |publisher=www.smh.com.au |date=26 October 2019 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213132734/https://www.smh.com.au/sport/tennis/de-minaur-guaranteed-career-high-ranking-after-storming-into-swiss-indoor-semis-20191026-p534gl.html |url-status=live }} At the Paris Masters, he upset world No. 8 and defending champion, Karen Khachanov, in the second round for the seventh Top 10 win of his career.{{cite news |title=Struff Stops Defending Champion Khachanov In Paris |url=https://www.atptour.com/en/news/khachanov-fritz-paris-2019-tuesday |access-date=13 December 2022 |publisher=www.atptour.com |date=29 October 2019 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213133132/https://www.atptour.com/en/news/khachanov-fritz-paris-2019-tuesday |url-status=live }} He lost in the third round to Jo-Wilfried Tsonga in three sets.{{cite news |title=Nadal defeats Wawrinka and remains packed at the Paris Masters |url=https://revistatenis.uol.com.br/artigo/nadal-derrota-wawrinka-masters-paris_16954.html |access-date=13 December 2022 |publisher=revistatenis.uol.com.br |date=31 October 2019 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213133730/https://revistatenis.uol.com.br/artigo/nadal-derrota-wawrinka-masters-paris_16954.html |url-status=live }}

Struff started his 2020 season by representing Germany at the 1st edition of the ATP Cup. Germany was in Group F alongside Australia, Greece, and Canada. Against Australia, he lost to Nick Kyrgios.{{cite news |last1=Fitzgerald |first1=Matt |title=Playing with a purpose: Kyrgios hits 20 aces in ATP Cup win vs. Struff |url=https://www.tennis.com/news/articles/playing-with-a-purpose-kyrgios-hits-20-aces-in-atp-cup-win-vs-struff |access-date=13 December 2022 |publisher=www.tennis.com |date=3 January 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213140613/https://www.tennis.com/news/articles/playing-with-a-purpose-kyrgios-hits-20-aces-in-atp-cup-win-vs-struff |url-status=live }} Against Greece, he won his match over Michail Pervolarakis.{{cite news |last1=Huiber |first1=Jens |title=ATP Cup: Struff puts Germany in the lead |url=https://www.tennisnet.com/en/news/atp-cup-struff-puts-germany-in-the-lead |access-date=13 December 2022 |publisher=www.tennisnet.com |date=5 January 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213140615/https://www.tennisnet.com/en/news/atp-cup-struff-puts-germany-in-the-lead |url-status=live }} Against Canada, he got the victory over Félix Auger-Aliassime.{{cite news |last1=MESIC |first1=DZEVAD |title=Jan-Lennard Struff reacts to Felix Auger-Aliassime win at ATP Cup |url=https://www.tennisworldusa.org/tennis/news/Tennis_Interviews/82486/janlennard-struff-reacts-to-felix-augeraliassime-win-at-atp-cup-/ |access-date=13 December 2022 |publisher=www.tennisworldusa.org |date=8 January 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213140626/https://www.tennisworldusa.org/tennis/news/Tennis_Interviews/82486/janlennard-struff-reacts-to-felix-augeraliassime-win-at-atp-cup-/ |url-status=live }} In the end, Germany ended 3rd in Group F. Seeded seventh at the first edition of the Adelaide International, he lost in the second round to Australian wildcard Alex Bolt.{{cite news |last1=Larkin |first1=Steve |title=Aussie Bolt's boilover at Adelaide ATP |url=https://thewest.com.au/sport/tennis/russias-rublev-advances-at-adelaide-atp-ng-s-1989618 |access-date=13 December 2022 |publisher=thewest.com.au |date=15 January 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213141156/https://thewest.com.au/sport/tennis/russias-rublev-advances-at-adelaide-atp-ng-s-1989618 |url-status=live }} Ranked 37 at the Australian Open, he was defeated in the first round by world No. 2, seven-time champion, and eventual champion, Novak Djokovic, in four sets.{{cite news |title=Australian Open 2020 news - Novak Djokovic beats Jan-Lennard Struff in four sets |url=https://www.eurosport.com/tennis/australian-open/2020/australian-open-2020-live-updates-novak-djokovic-v-jan-lennard-struff-latest-news-and-tv-stream_sto7613622/story.shtml |access-date=13 December 2022 |publisher=www.eurosport.com |date=20 January 2020 |archive-date=5 October 2023 |archive-url=https://web.archive.org/web/20231005013202/https://www.eurosport.com/geoblocking.shtml |url-status=live }}

At the Rotterdam Open, Struff lost in the first round to eventual finalist, Félix Auger-Aliassime, in three sets.{{cite news |title=Félix Auger-Aliassime wins Rotterdam opener against Jan-Lennard Struff |url=https://www.theglobeandmail.com/sports/tennis/article-felix-auger-aliassime-wins-rotterdam-opener-against-jan-lennard-struff/ |access-date=13 December 2022 |publisher=www.theglobeandmail.com |date=11 February 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213142203/https://www.theglobeandmail.com/sports/tennis/article-felix-auger-aliassime-wins-rotterdam-opener-against-jan-lennard-struff/ |url-status=live }} However, in doubles, he and his partner, Henri Kontinen, reached the final where they lost to Pierre-Hugues Herbert and Nicolas Mahut.{{cite news |title=Herbert/Mahut Capture Second Rotterdam Crown |url=https://www.atptour.com/en/news/herbert-mahut-rotterdam-2020-doubles-final |access-date=13 December 2022 |publisher=www.atptour.com |date=16 February 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213183440/https://www.atptour.com/en/news/herbert-mahut-rotterdam-2020-doubles-final |url-status=live }} In Dubai, he upset fifth seed, world No. 12, and 2018 champion, Roberto Bautista Agut, in the first round.{{cite news |title=Tsitsipas sets his marker, Struff stuns Bautista Agut |url=https://dubaidutyfreetennischampionships.com/scintillating-tsitsipas-sets-his-marker-struff-stuns-bautista-agut/ |access-date=13 December 2022 |publisher=dubaidutyfreetennischampionships.com |date=26 February 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213150133/https://dubaidutyfreetennischampionships.com/scintillating-tsitsipas-sets-his-marker-struff-stuns-bautista-agut/ |url-status=live }} He reached the quarterfinals where he fell to second seed, world No. 6, last year finalist, and eventual finalist, Stefanos Tsitsipas, in three sets.{{cite news |title=Dubai Tennis Championships: Dan Evans will face Stefanos Tsitsipas in semis |url=https://www.bbc.com/sport/tennis/51658972 |access-date=13 December 2022 |publisher=www.bbc.com |date=27 February 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213144634/https://www.bbc.com/sport/tennis/51658972 |url-status=live }} Representing Germany in the Davis Cup tie against Belarus, he won both of his rubbers by beating Ilya Ivashka and Egor Gerasimov. Germany ended up winning the tie over Belarus 4-1.{{cite news |title=Belarus lose to Germany in 2020 Davis Cup qualifier |url=https://eng.belta.by/sport/view/belarus-lose-to-germany-in-2020-davis-cup-qualifier-128840-2020/ |access-date=13 December 2022 |publisher=eng.belta.by |date=9 March 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213145442/https://eng.belta.by/sport/view/belarus-lose-to-germany-in-2020-davis-cup-qualifier-128840-2020/ |url-status=live }} The ATP Tour cancelled all tournaments from March through July due to the COVID-19 pandemic.{{cite news |title=ATP Suspends Tour For Six Weeks Due To Public Health & Safety Issues Over COVID-19 |url=https://www.atptour.com/en/news/atp-tour-2020-six-week-suspension-decision |access-date=13 December 2022 |publisher=www.atptour.com |date=12 March 2020 |archive-date=14 March 2020 |archive-url=https://web.archive.org/web/20200314201715/https://www.atptour.com/en/news/atp-tour-2020-six-week-suspension-decision |url-status=live }}{{cite news |title=ATP Extends Tour Suspension |url=https://www.atptour.com/en/news/atp-extends-tour-suspension |access-date=13 December 2022 |publisher=www.atptour.com |date=15 May 2020 |archive-date=8 November 2020 |archive-url=https://web.archive.org/web/20201108000551/https://www.atptour.com/en/news/atp-extends-tour-suspension |url-status=live }}

When the ATP Tour resumed tournament play in August, Struff competed at the Western & Southern Open. This event usually takes place in Cincinnati but this year, it was held at the USTA Billie Jean King National Tennis Center in New York City in order to reduce unnecessary player travel by centralizing the tournament and the subsequent US Open in the same venue.{{cite news |title=Western & Southern Open moving from Mason to New York in 2020 |url=https://www.wlwt.com/article/plan-approved-to-move-western-southern-open-from-mason-to-new-york-in-2020/32882718 |access-date=13 December 2022 |publisher=www.wlwt.com |date=17 June 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213150856/https://www.wlwt.com/article/plan-approved-to-move-western-southern-open-from-mason-to-new-york-in-2020/32882718 |url-status=live }} He upset 12th seed and world No. 17, Denis Shapovalov, in the second round.{{cite news |title=Milos Raonic reaches round of 16 at U.S. Open tune-up event |url=https://www.theglobeandmail.com/sports/tennis/article-milos-raonic-reaches-round-of-16-at-us-open-tune-up-event/ |access-date=13 December 2022 |publisher=www.theglobeandmail.com |date=24 August 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213152335/https://www.theglobeandmail.com/sports/tennis/article-milos-raonic-reaches-round-of-16-at-us-open-tune-up-event/ |url-status=live }} He then upset seventh seed and world No. 10, David Goffin, in the third round to earn his best ATP Masters 1000 showing by reaching the quarterfinals.{{cite news |title=Djokovic rolls past Sandgren at Western and Southern Open |url=https://kfgo.com/2020/08/25/djokovic-rolls-past-sandgren-at-western-and-southern-open/ |access-date=13 December 2022 |publisher=kfgo.com |date=25 August 2020 |archive-date=5 October 2023 |archive-url=https://web.archive.org/web/20231005013244/https://kfgo.com/2020/08/25/djokovic-rolls-past-sandgren-at-western-and-southern-open/ |url-status=live }} He ended up losing his quarterfinal match to world No. 1, 2018 champion, and eventual champion, Novak Djokovic.{{cite news |title=Novak Djokovic cruises past Jan Lennard Struff to reach his eighth semifinal at the Western and Southern Open |url=https://www.ubitennis.net/2020/08/novak-djokovic-cruises-past-jan-lennard-struff-to-reach-his-eighth-semifinal-at-the-western-and-southern-open/ |access-date=13 December 2022 |publisher=www.ubitennis.net |date=26 August 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213152337/https://www.ubitennis.net/2020/08/novak-djokovic-cruises-past-jan-lennard-struff-to-reach-his-eighth-semifinal-at-the-western-and-southern-open/ |url-status=live }} As a result, he entered the top 30 for the first time in his career and reached a career-high in singles of World No. 29 on 31 August 2020. Seeded 28th at the US Open, he made it to the third round where he was defeated by three-time champion Djokovic.{{cite news |last1=Osborn |first1=Richard |title=Motivated Novak Djokovic extends winning streak to 26-0 at 2020 US Open |url=https://www.usopen.org/en_US/news/articles/2020-09-04/shelby_rogers_powers_into_round_of_16_at_2020_us_open.html |access-date=13 December 2022 |publisher=www.usopen.org |date=4 September 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213152919/https://www.usopen.org/en_US/news/articles/2020-09-04/shelby_rogers_powers_into_round_of_16_at_2020_us_open.html |url-status=live }}

At the Italian Open, Struff lost in the first round to qualifier Federico Coria.{{cite news |last1=DAMPF |first1=ANDREW |title=Italian teenager Musetti stuns Wawrinka in Rome |url=https://apnews.com/article/novak-djokovic-us-open-tennis-championships-rome-tennys-sandgren-salvatore-caruso-b581c3f56e231100fea091376697f231 |access-date=13 December 2022 |publisher=apnews.com |date=15 September 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213153426/https://apnews.com/article/novak-djokovic-us-open-tennis-championships-rome-tennys-sandgren-salvatore-caruso-b581c3f56e231100fea091376697f231 |url-status=live }} In Hamburg, he was defeated in the first round by eighth seed and world No. 16, Karen Khachanov.{{cite news |title=Karen Khachanov begins Hamburg European Open with victory |url=https://sport.news.am/eng/news/114993/karen-khachanov-begins-hamburg-european-open-with-victory.html |access-date=13 December 2022 |publisher=sport.news.am |date=22 September 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213154005/https://sport.news.am/eng/news/114993/karen-khachanov-begins-hamburg-european-open-with-victory.html |url-status=live }} Seeded 30th at the French Open, he was eliminated from the tournament in the second round by qualifier and compatriot, Daniel Altmaier.{{cite news |title=French Open 2020: Daniel Altmaier surprisingly beats Jan-Lennard Struff |url=https://www.tennisnet.com/en/news/french-open-2020-daniel-altmaier-surprisingly-beats-jan-lennard-struff |access-date=13 December 2022 |publisher=www.tennisnet.com |date=1 October 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213155330/https://www.tennisnet.com/en/news/french-open-2020-daniel-altmaier-surprisingly-beats-jan-lennard-struff |url-status=live }}

Seeded seventh at the Bett1Hulks Indoors, Struff lost in the first round to qualifier and compatriot, Oscar Otte.{{cite news |title=Otte Ousts Struff In Cologne |url=https://www.tennis-tourtalk.com/63821/otte-ousts-struff-in-cologne |access-date=13 December 2022 |publisher=www.tennis-tourtalk.com |date=12 October 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213160017/https://www.tennis-tourtalk.com/63821/otte-ousts-struff-in-cologne |url-status=live }} Seeded seventh at the Bett1Hulks Championship, he was defeated in the second round by Yoshihito Nishioka.{{cite news |title=No. 1 seed Goffin ousted by Giron in Antwerp |url=https://www.reuters.com/article/us-tennis-roundup/no-1-seed-goffin-ousted-by-giron-in-antwerp-idUSKBN27737I |access-date=13 December 2022 |publisher=www.reuters.com |date=22 October 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213160849/https://www.reuters.com/article/us-tennis-roundup/no-1-seed-goffin-ousted-by-giron-in-antwerp-idUSKBN27737I |url-status=live }} In Vienna, he was beaten in the first round by third seed and world No. 5, Stefanos Tsitsipas.{{cite news |title=With New Shoe, Stef Steps It Up Against Struff In Vienna |url=https://www.atptour.com/en/news/tsitsipas-struff-vienna-2020-wednesday |access-date=13 December 2022 |publisher=www.atptour.com |date=28 October 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213180552/https://www.atptour.com/en/news/tsitsipas-struff-vienna-2020-wednesday |url-status=live }} At the Paris Masters, he lost in the second round to ninth seed and world No. 15, Pablo Carreño Busta.{{cite news |title=ATP Masters Paris-Bercy: Jan-Lennard Struff fails to Pablo Carreno Busta |url=https://www.tennisnet.com/en/news/atp-masters-paris-bercy-jan-lennard-struff-fails-to-pablo-carreno-busta |access-date=13 December 2022 |publisher=www.tennisnet.com |date=3 November 2020 |archive-date=13 December 2022 |archive-url=https://web.archive.org/web/20221213181357/https://www.tennisnet.com/en/news/atp-masters-paris-bercy-jan-lennard-struff-fails-to-pablo-carreno-busta |url-status=live }} Struff played his final tournament of the season at the Sofia Open. Seeded fourth, he lost in the second round to eventual finalist Vasek Pospisil.{{cite news |title=Albot Stuns Shapovalov In Sofia |url=https://www.atptour.com/en/news/shapovalov-albot-sofia-2020-tuesday |access-date=13 December 2022 |publisher=www.atptour.com |date=10 November 2020 |archive-date=11 November 2020 |archive-url=https://web.archive.org/web/20201111071820/https://www.atptour.com/en/news/shapovalov-albot-sofia-2020-tuesday |url-status=live }}

Struff ended the year ranked No. 36.

Struff started his 2021 season at the Antalya Open. Seeded fifth, he reached the quarterfinals where he lost to Jérémy Chardy, despite having two match points in the third-set tie breaker.{{cite news |title=Bublik Beats Berrettini, Chardy Saves Two Match Points in Antalya |url=https://www.tennisnow.com/News/2021/January/Bublik-Beats-Berrettini,-Chardy-Saves-Two-Match-Po.aspx |access-date=14 December 2022 |publisher=www.tennisnow.com |date=11 January 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214124131/https://www.tennisnow.com/News/2021/January/Bublik-Beats-Berrettini,-Chardy-Saves-Two-Match-Po.aspx |url-status=live }} In February, he represented Germany with Alexander Zverev, Kevin Krawietz and Andreas Mies at the ATP Cup. Germany was in Group A alongside Canada and Serbia. He beat Milos Raonic of Canada,{{cite news |title=Zverev's First ATP Cup Victory Seals Canada's Fate |url=https://www.atptour.com/en/news/canada-germany-atp-cup-2021-wednesday |access-date=14 December 2022 |publisher=www.atptour.com |date=3 February 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214125437/https://www.atptour.com/en/news/canada-germany-atp-cup-2021-wednesday |url-status=live }} and Dušan Lajović of Serbia to help Germany qualify for the semifinals.{{cite news |title=Djokovic Praises Serbia's Fight After ATP Cup Exit |url=https://www.atptour.com/en/news/serbia-djokovic-troicki-atp-cup-2021-reaction-friday |access-date=14 December 2022 |publisher=www.atptour.com |date=5 February 2021 |archive-date=7 November 2021 |archive-url=https://web.archive.org/web/20211107224134/https://www.atptour.com/en/news/serbia-djokovic-troicki-atp-cup-2021-reaction-friday |url-status=live }} In the semifinal tie against Russia, he lost to Andrey Rublev in three sets. In the end, Russia beat Germany 2-1 to advance to the ATP Cup final.{{cite news |title=Medvedev, Rublev Propel Russia To First ATP Cup Final |url=https://www.atptour.com/en/news/russia-germany-atp-cup-2021-saturday |access-date=14 December 2022 |publisher=www.atptour.com |date=6 February 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214125436/https://www.atptour.com/en/news/russia-germany-atp-cup-2021-saturday |url-status=live }} At the Australian Open, he lost in the first round to Australian wildcard Christopher O'Connell.{{cite news |last1=Walton |first1=Darren |title=Aussie battler springs huge Australian Open upset over world No. 37 |url=https://7news.com.au/sport/tennis/oconnell-the-latest-local-open-winner-c-2126098 |access-date=14 December 2022 |publisher=7news.com.au |date=8 February 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214125837/https://7news.com.au/sport/tennis/oconnell-the-latest-local-open-winner-c-2126098 |url-status=live }}

Seeded eighth at the Open Sud de France, Struff was defeated in the first round by qualifier and compatriot, Peter Gojowczyk.{{cite news |last1=Lupo |first1=John |title=ATP Montpellier Day 2 wrapup: Gerasimov ousts Murray; Struff upset |url=https://www.vavel.com/en-us/tennis-usa/2021/02/23/1060794-atp-montpellier-day-2-wrapup-gerasimov-ousts-murray-struff-upset.html |access-date=14 December 2022 |publisher=www.vavel.com |date=24 February 2021 |archive-date=30 September 2022 |archive-url=https://web.archive.org/web/20220930074110/https://www.vavel.com/en-us/tennis-usa/2021/02/23/1060794-atp-montpellier-day-2-wrapup-gerasimov-ousts-murray-struff-upset.html |url-status=live }} In Rotterdam, he was beaten in the first round by sixth seed, world No. 14, and 2017 finalist, David Goffin.{{cite news |title=Medvedev, Zverev eliminated in 1st round in Rotterdam |url=https://borneobulletin.com.bn/medvedev-zverev-eliminated-in-1st-round-in-rotterdam/ |access-date=14 December 2022 |publisher=borneobulletin.com.bn |date=5 March 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214134653/https://borneobulletin.com.bn/medvedev-zverev-eliminated-in-1st-round-in-rotterdam/ |url-status=live }} At the Dubai Championships, he lost in the second round to third seed and world No. 12, Denis Shapovalov.{{cite news |title=Canadian Denis Shapovalov crushes Germany's Jan-Lennard Struff in Dubai |url=https://www.reddeeradvocate.com/sports/canadian-denis-shapovalov-crushes-germanys-jan-lennard-struff-in-dubai/ |access-date=14 December 2022 |publisher=www.reddeeradvocate.com |date=16 March 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214132144/https://www.reddeeradvocate.com/sports/canadian-denis-shapovalov-crushes-germanys-jan-lennard-struff-in-dubai/ |url-status=live }} Seeded 31st at the Miami Open, he made it to the third round where he was eliminated by seventh seed and world No. 12, Roberto Bautista Agut.{{cite news |title=Top-seeded Daniil Medvedev hobbles into Miami Open 4th round |url=https://www.dailysabah.com/sports/tennis/top-seeded-daniil-medvedev-hobbles-into-miami-open-4th-round |access-date=14 December 2022 |publisher=www.dailysabah.com |date=29 March 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214132639/https://www.dailysabah.com/sports/tennis/top-seeded-daniil-medvedev-hobbles-into-miami-open-4th-round |url-status=live }}

Struff started his clay-court season at the Sardegna Open. Seeded fifth, he reached the quarterfinals where he fell to fourth seed Nikoloz Basilashvili.{{cite news |title=Fritz Reaches Final Four In Cagliari |url=https://www.atptour.com/en/news/fritz-bedene-cagliari-2021-friday |access-date=14 December 2022 |publisher=www.atptour.com |date=9 April 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214133349/https://www.atptour.com/en/news/fritz-bedene-cagliari-2021-friday |url-status=live }} In Monte-Carlo, he lost in the first round to 14th seed and world No. 17, Grigor Dimitrov. Seeded seventh at the BMW Open in Munich, he reached his first ATP singles final after defeating fourth seed, Filip Krajinović, in the quarterfinals, after a three hour match, and qualifier, Ilya Ivashka, in the semifinals. This was his best performance at this tournament since reaching the semifinals in 2014 (l. to Fabio Fognini).{{cite news |title=Struff Survives Krajinovic Thriller In Munich |url=https://www.atptour.com/en/news/zverev-ivashka-struff-munich-2021-friday |access-date=14 December 2022 |publisher=www.atptour.com |date=30 April 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214123307/https://www.atptour.com/en/news/zverev-ivashka-struff-munich-2021-friday |url-status=live }}{{cite news |title=Jan-Lennard Struff sets up a final against Nikoloz Basilashvili at the BMW Open in Munich |url=https://www.ubitennis.net/2021/05/jan-lennard-struff-sets-up-a-final-against-nikoloz-basilashvili-at-the-bmw-open-in-munich/ |access-date=14 December 2022 |publisher=www.ubitennis.net |date=1 May 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214140142/https://www.ubitennis.net/2021/05/jan-lennard-struff-sets-up-a-final-against-nikoloz-basilashvili-at-the-bmw-open-in-munich/ |url-status=live }} He lost in the final to fifth seed Nikoloz Basilashvili.{{cite news |title=Basilashvili Lifts Munich Trophy |url=https://www.atptour.com/en/news/basilashvili-struff-munich-2021-final |access-date=14 December 2022 |publisher=www.atptour.com |date=2 May 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214140155/https://www.atptour.com/en/news/basilashvili-struff-munich-2021-final |url-status=live }} At the Madrid Open, he was eliminated from the tournament in the first round by qualifier Alexei Popyrin.{{cite news |title=Dominic Thiem cruises through at Madrid Open, Simona Halep knocked out |url=https://timesofindia.indiatimes.com/sports/tennis/top-stories/dominic-thiem-cruises-through-at-madrid-open-simona-halep-knocked-out/articleshow/82398678.cms |access-date=14 December 2022 |publisher=timesofindia.indiatimes.com |date=5 May 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214140834/https://timesofindia.indiatimes.com/sports/tennis/top-stories/dominic-thiem-cruises-through-at-madrid-open-simona-halep-knocked-out/articleshow/82398678.cms |url-status=live }} In Rome, he lost in the second round to world No. 7, Andrey Rublev, in three sets.{{cite news |title=Fourth seed Thiem battles into Italian Open third round |url=https://timesofindia.indiatimes.com/sports/tennis/top-stories/fourth-seed-thiem-battles-into-italian-open-third-round/articleshow/82573431.cms |access-date=14 December 2022 |publisher=timesofindia.indiatimes.com |date=12 May 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214141558/https://timesofindia.indiatimes.com/sports/tennis/top-stories/fourth-seed-thiem-battles-into-italian-open-third-round/articleshow/82573431.cms |url-status=live }} Seeded fourth at the first edition of the Emilia-Romagna Open in Parma, Italy, he reached the quarterfinals where he lost to sixth seed Tommy Paul.{{cite news |title=Korda to face Paul in all-American semifinal in Parma |url=https://www.tennis.com/news/articles/korda-to-face-paul-in-all-american-semifinal-in-parma |access-date=14 December 2022 |publisher=www.tennis.com |date=27 May 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214142350/https://www.tennis.com/news/articles/korda-to-face-paul-in-all-american-semifinal-in-parma |url-status=live }} Ranked 42 at the French Open, he upset world No. 7, Andrey Rublev, in the first round in five sets.{{cite news |title=Struff Upsets Rublev In Roland Garros Opener |url=https://www.atptour.com/en/news/rublev-struff-roland-garros-2021-tuesday |access-date=14 December 2022 |publisher=www.atptour.com |date=1 June 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214143146/https://www.atptour.com/en/news/rublev-struff-roland-garros-2021-tuesday |url-status=live }} He proceeded to the fourth round after wins over Facundo Bagnis{{cite news |title=French Open: Jan-Lennard Struff rounds off a perfect German day with a three-set success over Facundo Bagnis |url=https://www.tennisnet.com/en/news/french-open-jan-lennard-struff-rounds-off-a-perfect-german-day-with-a-three-set-success-over-facundo-bagnis |access-date=14 December 2022 |publisher=www.tennisnet.com |date=3 June 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214143143/https://www.tennisnet.com/en/news/french-open-jan-lennard-struff-rounds-off-a-perfect-german-day-with-a-three-set-success-over-facundo-bagnis |url-status=live }} and qualifier Carlos Alcaraz.{{cite news |last1=Huiber |first1=Jens |title=French Open 2021: Struff beats Alcaraz, in the round of 16 against Schwartzman |url=https://www.tennisnet.com/en/news/french-open-2021-struff-beats-alcaraz-in-the-round-of-16-against-schwartzman |access-date=14 December 2022 |publisher=www.tennisnet.com |date=5 June 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214143147/https://www.tennisnet.com/en/news/french-open-2021-struff-beats-alcaraz-in-the-round-of-16-against-schwartzman |url-status=live }} He lost in the fourth round to world No. 10 Diego Schwartzman.{{cite news |title=Schwartzman ends Struff run to reach French Open quarter-finals |url=https://timesofindia.indiatimes.com/sports/tennis/french-open/schwartzman-ends-struff-run-to-reach-french-open-quarter-finals/articleshow/83310429.cms |access-date=14 December 2022 |publisher=timesofindia.indiatimes.com |date=7 June 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214143716/https://timesofindia.indiatimes.com/sports/tennis/french-open/schwartzman-ends-struff-run-to-reach-french-open-quarter-finals/articleshow/83310429.cms |url-status=live }}

Struff began his grass-court season at the Halle Open. He stunned top seed and world No. 2, Daniil Medvedev, in the first round.{{cite news |title=Struff Beats Medvedev In Halle Opener |url=https://www.atptour.com/en/news/struff-medvedev-halle-2021-tuesday |access-date=14 December 2022 |publisher=www.atptour.com |date=15 June 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214144328/https://www.atptour.com/en/news/struff-medvedev-halle-2021-tuesday |url-status=live }} He lost in the second round to qualifier, Marcos Giron, in three sets.{{cite news |title=Felix Stuns 'Idol' Federer To Reach Halle QF |url=https://www.atptour.com/en/news/federer-auger-aliassime-halle-2021-tuesday |access-date=14 December 2022 |publisher=www.atptour.com |date=16 June 2021 |archive-date=31 May 2022 |archive-url=https://web.archive.org/web/20220531041235/https://www.atptour.com/en/news/federer-auger-aliassime-halle-2021-tuesday |url-status=live }} At the first edition of the Mallorca Championships, he was defeated in the first round by Adrian Mannarino.{{cite news |title=Mannarino & Thompson Advance in Mallorca |url=https://www.atptour.com/en/news/singles-mallorca-sunday-2021 |access-date=14 December 2022 |publisher=www.atptour.com |date=20 June 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214144838/https://www.atptour.com/en/news/singles-mallorca-sunday-2021 |url-status=live }} Ranked No. 45 at Wimbledon, he lost in the first round to world No. 2, Daniil Medvedev, in four sets.{{cite news |title=Medvedev Takes Struff 'Revenge' In Wimbledon Opener |url=https://www.atptour.com/en/news/wimbledon-2021-medvedev-struff-tuesday |access-date=14 December 2022 |publisher=www.atptour.com |date=29 June 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214145602/https://www.atptour.com/en/news/wimbledon-2021-medvedev-struff-tuesday |url-status=live }}

After Wimbledon, Struff competed at the Hamburg European Open. Seeded seventh, he lost in the first round to Laslo Djere.{{cite news |title=Struff suffers early exit in Hamburg |url=https://www.mykhel.com/tennis/struff-suffers-early-exit-in-hamburg-atp-500-170593.html |access-date=14 December 2022 |publisher=www.mykhel.com |date=14 July 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214150406/https://www.mykhel.com/tennis/struff-suffers-early-exit-in-hamburg-atp-500-170593.html |url-status=live }} Representing Germany at the Summer Olympics, he was defeated in the second round by world No. 1 Novak Djokovic.{{cite news |title=Djokovic dismisses Struff in Tokyo to keep Golden Slam hopes alive |url=https://olympics.com/en/news/djokovic-beat-struff-tokyo-olympics-golden-slam |access-date=14 December 2022 |publisher=olympics.com |date=26 July 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214150826/https://olympics.com/en/news/djokovic-beat-struff-tokyo-olympics-golden-slam |url-status=live }}

At the National Bank Open in Toronto, Struff lost in the first round to Fabio Fognini.{{cite news |title=Feisty Fognini scrapes into ATP Toronto second round |url=https://www.news9live.com/sports/tennis/feisty-fognini-scrapes-into-atp-toronto-second-round-62699.html |access-date=14 December 2022 |publisher=www.news9live.com |date=9 August 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214183949/https://www.news9live.com/sports/tennis/feisty-fognini-scrapes-into-atp-toronto-second-round-62699.html |url-status=live }} In Cincinnati, he was beaten in the first round by lucky loser and compatriot, Dominik Koepfer.{{cite news |title=Cincinnati Masters: Andy Murray returns with win over Richard Gasquet |url=https://timesofindia.indiatimes.com/sports/tennis/top-stories/andy-murray-returns-with-win-over-richard-gasquet-in-cincinnati-masters/articleshow/85391309.cms |access-date=14 December 2022 |publisher=timesofindia.indiatimes.com |date=17 August 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214184615/https://timesofindia.indiatimes.com/sports/tennis/top-stories/andy-murray-returns-with-win-over-richard-gasquet-in-cincinnati-masters/articleshow/85391309.cms |url-status=live }} Seeded ninth at the Winston-Salem Open, he lost in the third round to eventual champion Ilya Ivashka.{{cite news |title=Tiafoe, Carreno Busta advance in Winston-Salem Open |url=https://sports.nbcsports.com/2021/08/26/tiafoe-carreno-busta-advance-in-winston-salem-open/ |access-date=14 December 2022 |publisher=sports.nbcsports.com |date=26 August 2021 |archive-date=14 December 2022 |archive-url=https://web.archive.org/web/20221214190151/https://sports.nbcsports.com/2021/08/26/tiafoe-carreno-busta-advance-in-winston-salem-open/ |url-status=live }} At the US Open, he was defeated in the first round by Tallon Griekspoor in five sets.{{cite news |title=Djokovic Overcomes Hiccup To Beat Rune At US Open |url=https://www.atptour.com/en/news/djokovic-rune-us-open-2021-tuesday |access-date=19 December 2022 |publisher=www.atptour.com |date=1 September 2021 |archive-date=19 December 2022 |archive-url=https://web.archive.org/web/20221219124248/https://www.atptour.com/en/news/djokovic-rune-us-open-2021-tuesday |url-status=live }}

At the Moselle Open in Metz, Struff was beaten in the first round by Mikael Ymer.{{cite news |last1=Monk |first1=Walter |title=How Andy Murray battled back to defeat home favourite Ugo Humbert in Metz |url=https://www.scotsman.com/sport/how-andy-murray-battled-back-to-defeat-home-favourite-ugo-humbert-in-metz-3391527 |access-date=19 December 2022 |publisher=www.scotsman.com |date=21 September 2021 |archive-date=19 December 2022 |archive-url=https://web.archive.org/web/20221219125100/https://www.scotsman.com/sport/how-andy-murray-battled-back-to-defeat-home-favourite-ugo-humbert-in-metz-3391527 |url-status=live }} In October, he competed at the Indian Wells Masters. He lost in the second round to 25th seed and world No. 30, Fabio Fognini.{{cite news |title=Albert Ramos-Vinolas upsets Felix Auger-Aliassime at Indian Wells |url=https://sportsnaut.com/albert-ramos-vinolas-upsets-felix-auger-aliassime-at-indian-wells/ |access-date=19 December 2022 |publisher=sportsnaut.com |date=11 October 2021 |archive-date=19 December 2022 |archive-url=https://web.archive.org/web/20221219125755/https://sportsnaut.com/albert-ramos-vinolas-upsets-felix-auger-aliassime-at-indian-wells/ |url-status=live }} At the European Open in Antwerp, he was eliminated in the second round by seventh seed Lloyd Harris.{{cite news |title=Harris Marches On In Antwerp |url=https://www.atptour.com/en/news/harris-antwerp-2021-thursday |access-date=19 December 2022 |publisher=www.atptour.com |date=21 October 2021 |archive-date=19 December 2022 |archive-url=https://web.archive.org/web/20221219140322/https://www.atptour.com/en/news/harris-antwerp-2021-thursday |url-status=live }} In St. Petersburg, Russia, he upset second seed and world No. 13, Denis Shapovalov, in the quarterfinals.{{cite news |title=Fritz Storms Into St. Petersburg SFs |url=https://www.atptour.com/en/news/fritz-struff-shapovalov-st-petersburg-2021-friday |access-date=19 December 2022 |publisher=www.atptour.com |date=29 October 2021 |archive-date=19 December 2022 |archive-url=https://web.archive.org/web/20221219141031/https://www.atptour.com/en/news/fritz-struff-shapovalov-st-petersburg-2021-friday |url-status=live }} He lost his semifinal match to fifth seed and world No. 28, Taylor Fritz.{{cite news |title=Fritz faces Cilic in St. Petersburg Open final |url=https://apnews.com/article/sports-tennis-russia-st-petersburg-andrey-rublev-d37dbf8c0b3694974be01b7e1ebcb403 |access-date=19 December 2022 |publisher=apnews.com |date=30 October 2021 |archive-date=19 December 2022 |archive-url=https://web.archive.org/web/20221219141029/https://apnews.com/article/sports-tennis-russia-st-petersburg-andrey-rublev-d37dbf8c0b3694974be01b7e1ebcb403 |url-status=live }} At the Paris Masters, he fell in the first round to qualifier Tommy Paul.{{cite news |title=Novak Djokovic shakes off rust with win at Paris Masters |url=https://www.deccanherald.com/sports/tennis/novak-djokovic-shakes-off-rust-with-win-at-paris-masters-1046931.html |access-date=19 December 2022 |publisher=www.deccanherald.com |date=3 November 2021 |archive-date=19 December 2022 |archive-url=https://web.archive.org/web/20221219175954/https://www.deccanherald.com/sports/tennis/novak-djokovic-shakes-off-rust-with-win-at-paris-masters-1046931.html |url-status=live }} In his final tournament of the season, Struff represented Germany at the Davis Cup Finals. Germany was in Group F alongside Serbia and Austria. Against Serbia, he lost to Novak Djokovic.{{cite news |last1=Ilic |first1=Jovica |title=Davis Cup Finals: Novak Djokovic beats Jan-Lennard Struff and keeps Serbia alive |url=https://www.tennisworldusa.org/tennis/news/On_the_ATP_results_with/105612/davis-cup-finals-novak-djokovic-beats-janlennard-struff-and-keeps-serbia-alive/ |access-date=20 December 2022 |publisher=www.tennisworldusa.org |date=27 November 2021 |archive-date=20 December 2022 |archive-url=https://web.archive.org/web/20221220130017/https://www.tennisworldusa.org/tennis/news/On_the_ATP_results_with/105612/davis-cup-finals-novak-djokovic-beats-janlennard-struff-and-keeps-serbia-alive/ |url-status=live }} Against Serbia, he beat Dennis Novak.{{cite news |title=USA eliminated from Davis Cup Finals after loss to Colombia |url=https://www.espn.com/tennis/story/_/id/32740016/usa-eliminated-davis-cup-finals-loss-colombia |access-date=20 December 2022 |work=www.espn.com |date=28 November 2021 |archive-date=20 December 2022 |archive-url=https://web.archive.org/web/20221220130015/https://www.espn.com/tennis/story/_/id/32740016/usa-eliminated-davis-cup-finals-loss-colombia |url-status=live }} Germany beat Serbia and Austria 2-1 to advance to the quarterfinals.{{cite news |last1=Crooks |first1=Eleanor |title=Novak Djokovic suffers Davis Cup setback as Serbia lose to Germany |url=https://www.independent.co.uk/sport/tennis/novak-djokovic-serbia-germany-viktor-troicki-filip-krajinovic-b1965412.html |access-date=20 December 2022 |publisher=www.independent.co.uk |date=27 November 2021 |archive-date=20 December 2022 |archive-url=https://web.archive.org/web/20221220130030/https://www.independent.co.uk/sport/tennis/novak-djokovic-serbia-germany-viktor-troicki-filip-krajinovic-b1965412.html |url-status=live }}{{cite news |title='This win shows what kind of team we are': Germany beats Austria to advance to quarter-finals |url=https://www.daviscupfinals.com/news/group-f-germany-v-austria |access-date=20 December 2022 |publisher=www.daviscupfinals.com |date=28 November 2021 |archive-date=20 December 2022 |archive-url=https://web.archive.org/web/20221220130017/https://www.daviscupfinals.com/news/group-f-germany-v-austria |url-status=live }} Playing Great Britain in the quarterfinals, he defeated Cam Norrie in three sets.{{cite news |last1=Fink |first1=Nikolaus |title=Davis Cup: Struff beats Norrie and equalizes for Germany |url=https://www.tennisnet.com/en/news/davis-cup-struff-beats-norrie-and-equalizes-for-germany |access-date=20 December 2022 |publisher=www.tennisnet.com |date=30 November 2021 |archive-date=20 December 2022 |archive-url=https://web.archive.org/web/20221220131223/https://www.tennisnet.com/en/news/davis-cup-struff-beats-norrie-and-equalizes-for-germany |url-status=live }} Germany beat Great Britain 2-1 to advance to the semifinals.{{cite news |title=Germany Defeats Great Britain In Thriller, Advances To Davis Cup SFs |url=https://www.atptour.com/en/news/germany-great-britain-davis-cup-2021-qf |access-date=20 December 2022 |publisher=www.atptour.com |date=30 November 2021 |archive-date=20 December 2022 |archive-url=https://web.archive.org/web/20221220131222/https://www.atptour.com/en/news/germany-great-britain-davis-cup-2021-qf |url-status=live }} In the semifinals against Russia, he lost to Daniil Medvedev.{{cite news |title=Russian Tennis Federation Sets Croatia Davis Cup Final |url=https://www.atptour.com/en/news/russian-tennis-federation-germany-davis-cup-finals-2021-saturday#:~:text=Medvedev%20then%20sealed%20victory%20for,6%2D4%20in%2066%20minutes. |access-date=20 December 2022 |publisher=www.atptour.com |date=4 December 2021 |archive-date=20 December 2022 |archive-url=https://web.archive.org/web/20221220131220/https://www.atptour.com/en/news/russian-tennis-federation-germany-davis-cup-finals-2021-saturday#:~:text=Medvedev%20then%20sealed%20victory%20for,6%2D4%20in%2066%20minutes. |url-status=live }} Germany ended up losing to Russia 1-2.{{cite news |title=Medvedev, Rublev seal Russia's win over Germany in Davis Cup semifinals |url=https://www.tennis.com/news/articles/rublev-gives-russia-1-0-lead-over-germany-in-davis-cup-semis |access-date=20 December 2022 |publisher=www.tennis.com |date=4 December 2021 |archive-date=20 December 2022 |archive-url=https://web.archive.org/web/20221220131222/https://www.tennis.com/news/articles/rublev-gives-russia-1-0-lead-over-germany-in-davis-cup-semis |url-status=live }}

Struff ended the year ranked No. 51.

Struff began his 2022 season by representing Germany at the ATP Cup. Germany was in Group C alongside Canada, Great Britain, and the USA. In his first match, he lost to Dan Evans of Great Britain.{{cite news |title=ATP Cup: Dan Evans leads Great Britain to victory over Germany in opener |url=https://www.skysports.com/tennis/news/12110/12507655/atp-cup-dan-evans-leads-great-britain-to-victory-over-germany-in-opener |access-date=14 July 2022 |publisher=www.skysports.com |date=2 January 2022 |archive-date=14 July 2022 |archive-url=https://web.archive.org/web/20220714023610/https://www.skysports.com/tennis/news/12110/12507655/atp-cup-dan-evans-leads-great-britain-to-victory-over-germany-in-opener |url-status=live }} In his second match, he defeated John Isner of the USA.{{cite news |title=Zverev, Struff Combine To Give Germany Victory Over USA |url=https://www.atptour.com/en/news/atp-cup-day-4-germany-v-usa |access-date=14 July 2022 |publisher=www.atptour.com |date=4 January 2022 |archive-date=14 July 2022 |archive-url=https://web.archive.org/web/20220714031004/https://www.atptour.com/en/news/atp-cup-day-4-germany-v-usa |url-status=live }} In his final match, he lost to Denis Shapovalov of Canada.{{cite news |title=Shapovalov and Auger-Aliassime clinch first semi-final berth for Canada at the ATP Cup |url=https://www.tenniscanada.com/news/shapovalov-and-auger-aliassime-clinch-first-semi-final-berth-for-canada-at-the-atp-cup/ |access-date=14 July 2022 |publisher=www.tenniscanada.com |date=6 January 2022 |archive-date=5 July 2022 |archive-url=https://web.archive.org/web/20220705154554/https://www.tenniscanada.com/news/shapovalov-and-auger-aliassime-clinch-first-semi-final-berth-for-canada-at-the-atp-cup/ |url-status=live }} Germany ended in third place in Group C. At the Adelaide International 2, he lost in the first round to qualifier Corentin Moutet.{{cite news |title=ATP roundup: Andy Murray wins opener in Australian Open tune-up |url=https://wincountry.com/2022/01/11/atp-roundup-andy-murray-wins-opener-in-australian-open-tune-up/ |access-date=14 July 2022 |publisher=wincountry.com |date=11 January 2022 |archive-date=5 October 2023 |archive-url=https://web.archive.org/web/20231005013202/https://wincountry.com/2022/01/11/atp-roundup-andy-murray-wins-opener-in-australian-open-tune-up/ |url-status=live }} Ranked No. 52 at the Australian Open, he was defeated in the first round by Botic van de Zandschulp.{{cite news |title=From the Zandschulp through without any problems, old-timer Murray is shining again on the track |url=https://nos.nl/artikel/2413505-van-de-zandschulp-probleemloos-door-oudgediende-murray-straalt-weer-op-de-baan |access-date=14 July 2022 |publisher=nos.nl |date=18 January 2022 |archive-date=14 July 2022 |archive-url=https://web.archive.org/web/20220714031726/https://nos.nl/artikel/2413505-van-de-zandschulp-probleemloos-door-oudgediende-murray-straalt-weer-op-de-baan |url-status=live }}

In February, Struff competed at the Dubai Championships. He lost in the first round to qualifier Ričardas Berankis.{{cite news |last1=Moore |first1=Glenn |title=Popyrin through, de Minaur out in Dubai |url=https://7news.com.au/sport/tennis/popyrin-through-but-de-minaur-goes-out-c-5802191 |access-date=14 July 2022 |publisher=7news.com.au |date=22 February 2022 |archive-date=14 July 2022 |archive-url=https://web.archive.org/web/20220714094800/https://7news.com.au/sport/tennis/popyrin-through-but-de-minaur-goes-out-c-5802191 |url-status=live }} Representing Germany in the Davis Cup tie against Brazil, he played one match and lost to Thiago Monteiro.{{cite news |title=Davis Cup: De Minaur & Fucsovics Leave Things All-Square In Sydney |url=https://www.atptour.com/en/news/davis-cup-qualifiers-2022-friday |access-date=4 December 2022 |publisher=www.atptour.com |date=4 March 2022 |archive-date=30 September 2022 |archive-url=https://web.archive.org/web/20220930000849/https://www.atptour.com/en/news/davis-cup-qualifiers-2022-friday |url-status=live }} In the end, Germany won the tie over Brazil 3-1.{{cite news |last1=Roberts |first1=Matt |title=FINALS-BOUND: GERMANY ADVANCE DESPITE BRAZILIAN RESILIENCE |url=https://www.daviscup.com/en/news/323760.aspx |access-date=4 December 2022 |publisher=www.daviscup.com |date=5 March 2022 |archive-date=4 December 2022 |archive-url=https://web.archive.org/web/20221204151552/https://www.daviscup.com/en/news/323760.aspx |url-status=live }} At the Indian Wells Masters, he fell in the first round to lucky loser John Millman.{{cite news |title=Andy Murray wins 700th career match |url=https://nypost.com/2022/03/12/britains-andy-murray-beats-japans-taro-daniel-for-700th-career-win/ |access-date=14 July 2022 |publisher=nypost.com |date=12 March 2022 |archive-date=14 July 2022 |archive-url=https://web.archive.org/web/20220714101630/https://nypost.com/2022/03/12/britains-andy-murray-beats-japans-taro-daniel-for-700th-career-win/ |url-status=live }} Seeded fourth at the Arizona Tennis Classic, an ATP Challenger event, he was eliminated in the first round by lucky loser and compatriot, Mats Moraing. However, in doubles, he and his partner Oscar Otte reached the final and lost to Treat Huey and Denis Kudla.{{cite news |last1=Romero |first1=José M. |title=Denis Kudla wins singles and doubles titles at Arizona Tennis Classic |url=https://www.azcentral.com/story/sports/tennis/2022/03/20/singles-doubles-titles-usa-denis-kudla-arizona-atp-event/7115355001/ |access-date=14 July 2022 |publisher=www.azcentral.com |date=20 March 2022 |archive-date=29 May 2022 |archive-url=https://web.archive.org/web/20220529124744/https://www.azcentral.com/story/sports/tennis/2022/03/20/singles-doubles-titles-usa-denis-kudla-arizona-atp-event/7115355001/ |url-status=live }} At the Miami Open, Struff retired during his first-round match against Pedro Martínez due to a right foot injury.{{cite news |last1=Escudero |first1=Daniel |title=Pedro Martínez starts with enthusiasm in Miami |url=https://canaltenis.com/martinez-struff-miami-open/ |access-date=14 July 2022 |publisher=canaltenis.com |archive-date=23 May 2022 |archive-url=https://web.archive.org/web/20220523143952/https://canaltenis.com/martinez-struff-miami-open/ |url-status=live }}{{cite news |last1=Fink |first1=Nikolaus |title=ATP Masters Miami: Struff gives up in round one, Altmaier out too |url=https://www.tennisnet.com/en/news/atp-masters-miami-struff-gives-up-in-round-one-altmaier-out-too |access-date=14 July 2022 |publisher=www.tennisnet.com |date=24 March 2022 |archive-date=19 May 2022 |archive-url=https://web.archive.org/web/20220519054739/https://www.tennisnet.com/en/news/atp-masters-miami-struff-gives-up-in-round-one-altmaier-out-too |url-status=live }}

Due to that injury, Struff missed these clay-court tournaments: Grand Prix Hassan II, Barcelona Open, BMW Open, Geneva Open, and French Open.{{cite news |last1=Strohschein |first1=Jörg |title=Jan-Lennard Struff is working on his comeback |url=https://www1.wdr.de/sport/mehr-sport/struff-kaempft-um-sein-comeback-100.html |access-date=4 December 2022 |publisher=www1.wdr.de |date=9 May 2022 |archive-date=18 November 2022 |archive-url=https://web.archive.org/web/20221118164613/https://www1.wdr.de/sport/mehr-sport/struff-kaempft-um-sein-comeback-100.html |url-status=live }}{{cite news |title=Jan-Lennard Struff is working on his comeback – more sport – sport |url=https://taketonews.com/jan-lennard-struff-is-working-on-his-comeback-more-sport-sport-2/ |access-date=19 December 2022 |publisher=taketonews.com |date=9 May 2022 |archive-date=19 December 2022 |archive-url=https://web.archive.org/web/20221219113523/https://taketonews.com/jan-lennard-struff-is-working-on-his-comeback-more-sport-sport-2/ |url-status=live }}

Struff returned to action during the grass-court season in June at the BOSS Open in Stuttgart. Playing as a wildcard, he won his first match since January by beating Marcos Giron in the first round in three sets.{{cite news |title=ATP Stuttgart: Struff wins comeback, Otte beats Altmaier |url=https://www.tennisnet.com/en/news/atp-stuttgart-struff-wins-comeback-otte-beats-altmaier |access-date=14 July 2022 |publisher=www.tennisnet.com |date=6 June 2022 |archive-date=14 July 2022 |archive-url=https://web.archive.org/web/20220714220522/https://www.tennisnet.com/en/news/atp-stuttgart-struff-wins-comeback-otte-beats-altmaier |url-status=live }} He lost in the second round to sixth seed Lorenzo Sonego.{{cite news |title=Murray Downs Bublik In Stuttgart, Reaches QFs |url=https://www.atptour.com/en/news/murray-bublik-stuttgart-2022-thursday |access-date=14 July 2022 |publisher=www.atptour.com |date=9 June 2022 |archive-date=10 June 2022 |archive-url=https://web.archive.org/web/20220610173439/https://www.atptour.com/en/news/murray-bublik-stuttgart-2022-thursday |url-status=live }} In Halle, he was defeated in the first round by Ilya Ivashka.{{cite news |title=Nikoloz Basilashvili stuns Andrey Rublev in 1st round of Halle Open |url=https://www.espn.com/tennis/story/_/id/34085063/nikoloz-basilashvili-stuns-andrey-rublev-1st-round-halle-open |access-date=15 July 2022 |work=www.espn.com |date=13 June 2022 |archive-date=15 July 2022 |archive-url=https://web.archive.org/web/20220715022821/https://www.espn.com/tennis/story/_/id/34085063/nikoloz-basilashvili-stuns-andrey-rublev-1st-round-halle-open |url-status=live }}{{cite news|title= Jan-Lennard Struff wants to fight his way back up|url= https://www.tennisnet.com/en/news/jan-lennard-struff-wants-to-fight-his-way-back-up|access-date= 15 November 2022|publisher= tennisnet.com|date= 15 June 2022|archive-date= 18 November 2022|archive-url= https://web.archive.org/web/20221118155305/https://www.tennisnet.com/en/news/jan-lennard-struff-wants-to-fight-his-way-back-up|url-status= live}} At the Mallorca Championships, he fell in the first round of qualifying to Fernando Verdasco. Ranked No. 155 at Wimbledon, he faced fifth seed and world No. 7, Carlos Alcaraz, in the first round. He pushed Alcaraz to five sets, but he ended up losing the match.{{cite news |title=Alcaraz Survives Struff Scare, Wins Five-Set Thriller |url=https://www.atptour.com/en/news/alcaraz-struff-wimbledon-2022-monday |access-date=15 July 2022 |publisher=www.atptour.com |date=27 June 2022 |archive-date=15 July 2022 |archive-url=https://web.archive.org/web/20220715023413/https://www.atptour.com/en/news/alcaraz-struff-wimbledon-2022-monday |url-status=live }}

After Wimbledon, Struff competed at the Brawo Open, an ATP Challenger event in Braunschweig, Germany. He won his 6th ATP Challenger tour title by beating compatriot, Maximilian Marterer, in the final.{{cite news |title=Jan-Lennard Struff wins Brawo Open 2022 in Braunschweig |url=https://www.harzkurier.de/sport/lokalsport/article235853831/Jan-Lennard-Struff-gewinnt-Brawo-Open-2022-in-Braunschweig.html |access-date=15 July 2022 |publisher=www.harzkurier.de |date=10 July 2022 |archive-date=10 July 2022 |archive-url=https://web.archive.org/web/20220710091537/https://www.harzkurier.de/sport/lokalsport/article235853831/Jan-Lennard-Struff-gewinnt-Brawo-Open-2022-in-Braunschweig.html |url-status=live }} He returned to the top 150 at world No. 126 on 11 July 2022. He also won the doubles title with Marcelo Demoliner by defeating Roman Jebavý and Adam Pavlásek in the final.{{cite news |title=Struff Shines At Brawo Open Braunschweig – Tennis TourTalk |url=https://newslanes.com/2022/07/09/struff-shines-at-brawo-open-braunschweig-tennis-tourtalk/ |access-date=15 July 2022 |publisher=newslanes.com |date=9 July 2022 |archive-date=4 April 2023 |archive-url=https://web.archive.org/web/20230404010315/https://newslanes.com/2022/07/09/struff-shines-at-brawo-open-braunschweig-tennis-tourtalk/ |url-status=live }} In Hamburg, he lost in the first round to seventh seed and world No. 26, Karen Khachanov, in three sets, despite having two match points at 6-5 in the third set.{{cite news |title=Foki Fells Botic In See-Saw Hamburg Opener |url=https://www.atptour.com/en/news/davidovich-fokina-van-de-zandschulp-hamburg-2022-monday |access-date=4 December 2022 |publisher=www.atptour.com |date=18 July 2022 |archive-date=4 December 2022 |archive-url=https://web.archive.org/web/20221204153255/https://www.atptour.com/en/news/davidovich-fokina-van-de-zandschulp-hamburg-2022-monday |url-status=live }} Seeded third at the first edition of the Zug Open, he was eliminated from the tournament in the second round by Italian qualifier Lorenzo Giustino.{{cite news |title=Huesler Earns Quarterfinal Spot At Zug Open |url=https://www.tennis-tourtalk.com/93398/huesler-earns-quarterfinal-spot-at-zug-open |access-date=4 December 2022 |publisher=www.tennis-tourtalk.com |date=27 July 2022 |archive-date=4 December 2022 |archive-url=https://web.archive.org/web/20221204153706/https://www.tennis-tourtalk.com/93398/huesler-earns-quarterfinal-spot-at-zug-open |url-status=live }} Seeded third at the Meerbusch Challenger, he was beaten in the second round by eventual finalist Dennis Novak.{{cite news |title=Dennis Novak beats Struff in Meerbusch |url=https://www.laola1.at/de/red/sport-mix/tennis/atp/news/tennis--dennis-novak-schlaegt-jan-lennard-struff-in-meerbusch/ |access-date=4 December 2022 |publisher=www.laola1.at |date=11 August 2022 |archive-date=4 December 2022 |archive-url=https://web.archive.org/web/20221204162301/https://www.laola1.at/de/red/sport-mix/tennis/atp/news/tennis--dennis-novak-schlaegt-jan-lennard-struff-in-meerbusch/ |url-status=live }} At the US Open, Struff fell in the second round of qualifying to Enzo Couacaud.

After the US Open, Struff competed at the Cassis Open. Seeded fifth, he lost in the second round to Borna Gojo. Then, he represented Germany in the Davis Cup Finals Group stage. Germany was in Group C alongside France, Belgium, and Australia. He beat Benjamin Bonzi of France, Zizou Bergs of Belgium, and Max Purcell of Australia. Germany did end up beating France, Belgium, and Australia which earned them a spot in the Knockout stage.{{cite news |last1=Rogers |first1=Leigh |title=Germany records victory against Australia at Davis Cup Finals |url=https://www.tennis.com.au/news/2022/09/19/germany-records-victory-against-australia-at-davis-cup-finals#:~:text=Germany%20records%20victory%20against%20Australia,News%20and%20Events%20%7C%20Tennis%20Australia |access-date=5 December 2022 |publisher=www.tennis.com.au |date=19 September 2022 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205130255/https://www.tennis.com.au/news/2022/09/19/germany-records-victory-against-australia-at-davis-cup-finals#:~:text=Germany%20records%20victory%20against%20Australia,News%20and%20Events%20%7C%20Tennis%20Australia |url-status=live }}{{cite news |title=Germany Earns Davis Cup Finals Group C Top Spot |url=https://www.tennis-tourtalk.com/95311/germany-earns-davis-cup-finals-group-c-top-spot |access-date=5 December 2022 |publisher=www.tennis-tourtalk.com |date=18 September 2022 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205130253/https://www.tennis-tourtalk.com/95311/germany-earns-davis-cup-finals-group-c-top-spot |url-status=live }} Getting past qualifying at the Sofia Open, he reached the quarterfinals where he was defeated by fourth seed Lorenzo Musetti.{{cite news |title=Sinner Continues Turin Quest, Reaches Sofia SFs |url=https://www.atptour.com/en/news/sinner-vukic-sofia-2022-friday |access-date=5 December 2022 |publisher=www.atptour.com |date=30 September 2022 |archive-date=28 November 2022 |archive-url=https://web.archive.org/web/20221128143849/https://www.atptour.com/en/news/sinner-vukic-sofia-2022-friday |url-status=live }} In Basel, he lost in the first round of qualifying to Roman Safiullin. At the Trofeo Faip–Perrel, he made it to the final where he was defeated by Otto Virtanen.{{cite news |title=Virtanen Claims First Challenger Crown In Bergamo |url=https://www.tennis-tourtalk.com/97365/virtanen-claims-first-challenger-crown-in-bergamo |access-date=5 December 2022 |publisher=www.tennis-tourtalk.com |date=6 November 2022 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205132102/https://www.tennis-tourtalk.com/97365/virtanen-claims-first-challenger-crown-in-bergamo |url-status=live }} At the Slovak Open, he lost in the first round to eventual finalist Fábián Marozsán. Struff played his final event of the year by representing Germany in the Davis Cup quarterfinal tie against Canada. He upset world No. 18 Denis Shapovalov.{{cite news |last1=Rothschädl |first1=Michael |title=Davis Cup: Germany leads! Jan-Lennard Struff surprises Denis Shapovalov |url=https://www.tennisnet.com/en/news/davis-cup-germany-leads-jan-lennard-struff-surprises-denis-shapovalov |access-date=5 December 2022 |publisher=www.tennisnet.com |date=24 November 2022 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205134144/https://www.tennisnet.com/en/news/davis-cup-germany-leads-jan-lennard-struff-surprises-denis-shapovalov |url-status=live }} In the end, Germany ended up losing 2-1 to Canada.{{cite news |title= Canada completes stunning comeback to reach Davis Cup semis |url=https://www.tenniscanada.com/news/davis-cup-finals-2022-canada-germany/ |access-date=5 December 2022 |publisher=www.tenniscanada.com |date=24 November 2022 |archive-date=5 December 2022 |archive-url=https://web.archive.org/web/20221205134135/https://www.tenniscanada.com/news/davis-cup-finals-2022-canada-germany/ |url-status=live }}

Struff ended the year ranked No. 151.

In January, Struff started his 2023 season at the Canberra Challenger. He reached the semifinals where he lost to Leandro Riedi.{{cite news |title=Tennis: a new final for Leandro Riedi |url=https://www.rts.ch/sport/tennis/13679694-tennis-une-nouvelle-finale-pour-leandro-riedi.html |access-date=6 January 2023 |publisher=www.rts.ch |date=6 January 2023 |archive-date=6 January 2023 |archive-url=https://web.archive.org/web/20230106072248/https://www.rts.ch/sport/tennis/13679694-tennis-une-nouvelle-finale-pour-leandro-riedi.html |url-status=live }}

Struff qualified for his ninth career-appearance in the main draw at the Australian Open.{{cite web | url=https://www.atptour.com/en/news/shang-piros-australian-open-qualifying-2023-thursday | title=Shang Juncheng: 17-Year-Old Charges into Australian Open Main Draw | ATP Tour | Tennis | access-date=2023-02-18 | archive-date=2023-01-31 | archive-url=https://web.archive.org/web/20230131133642/https://www.atptour.com/en/news/shang-piros-australian-open-qualifying-2023-thursday/ | url-status=live }}

He qualified for four back-to-back Masters 1000 at the Indian Wells Open, at the Miami Open{{cite web | url=https://www.atptour.com/en/news/struff-miami-2023-feature | title=No More Nightmares in Miami for Struff: 'I Don't Want to Stop Here' | ATP Tour | Tennis | access-date=2023-04-11 | archive-date=2023-04-11 | archive-url=https://web.archive.org/web/20230411055235/https://www.atptour.com/en/news/struff-miami-2023-feature | url-status=live }} and at the Monte-Carlo Masters where he reached the second round defeating Quentin Halys, Fabio Fognini and Albert Ramos Viñolas respectively. He returned to the top 100 on 3 April 2023. In Monte Carlo, he went one step further reaching the round of 16 with a defeat over 14th seed Alex de Minaur. Next, he upset fourth seed Casper Ruud, for his fourth top-5 win and first top-10 win since June 2021, reaching the quarterfinals for the second time at the Masters 1000-level in his career, which moved him into the top 65 in the rankings.{{cite web | url=https://www.atptour.com/en/news/rublev-khachanov-struff-ruud-monte-carlo-2023-thursday | title=Rublev Beats Khachanov, Struff Upsets Ruud in Monte-Carlo | ATP Tour | Tennis | access-date=2023-04-13 | archive-date=2023-04-13 | archive-url=https://web.archive.org/web/20230413191717/https://www.atptour.com/en/news/rublev-khachanov-struff-ruud-monte-carlo-2023-thursday | url-status=live }}

At the Madrid Open, he qualified for his fourth consecutive Masters as a lucky loser, where he reached also the second round defeating Lorenzo Sonego. Next he upset 32nd seed Ben Shelton to reach the third round. He reached the round of 16 with a win over Dušan Lajović. He made back to back Masters 1000 quarterfinals, and only his third in his career, defeating Pedro Cachin.{{cite web | url=https://www.tennis.com/news/articles/altmaier-struff-become-first-lucky-loser-duo-masters-1000-quarterfinal-madrid | title=Germans Altmaier, Struff become first lucky loser duo to make same Masters 1000 quarterfinal in Madrid | access-date=2023-05-02 | archive-date=2023-05-02 | archive-url=https://web.archive.org/web/20230502223144/https://www.tennis.com/news/articles/altmaier-struff-become-first-lucky-loser-duo-masters-1000-quarterfinal-madrid | url-status=live }}{{cite web | url=https://www.atptour.com/en/news/tsitsipas-miralles-madrid-2023-tuesday | title=Tsitsipas Shrugs off Service Slips to Reach Madrid Quarter-finals | ATP Tour | Tennis | access-date=2023-05-02 | archive-date=2023-05-05 | archive-url=https://web.archive.org/web/20230505175455/https://www.atptour.com/en/news/tsitsipas-miralles-madrid-2023-tuesday | url-status=live }} He reached the semifinals of a Masters for the first time in his career upsetting fourth seed Stefanos Tsitsipas for his second top-5 win of the season. He became the third lucky loser to advance to the semifinals of a Masters event, joining Thomas Johansson (2004 Toronto) and Lucas Pouille (2016 Rome).{{cite web | url=https://www.atptour.com/en/news/tsitsipas-struff-madrid-2023-qf | title=Lucky Loser Jan-Lennard Struff Stuns Stefanos Tsitsipas to Reach Madrid SFS | ATP Tour | Tennis | access-date=2023-05-05 | archive-date=2023-05-14 | archive-url=https://web.archive.org/web/20230514063602/https://www.atptour.com/en/news/tsitsipas-struff-madrid-2023-qf | url-status=live }} He then won his semifinal match against qualifier Aslan Karatsev, the player to whom he lost to in the qualifying rounds, and became the first lucky loser to reach a Masters final in history.{{cite web | url=https://www.atptour.com/en/news/karatsev-struff-madrid-2023-sf-friday | title=Jan-Lennard Struff Reaches Madrid Final | ATP Tour | Tennis | access-date=2023-05-05 | archive-date=2023-05-05 | archive-url=https://web.archive.org/web/20230505221430/https://www.atptour.com/en/news/karatsev-struff-madrid-2023-sf-friday | url-status=live }} In the final, he lost to world No. 2 and defending champion Carlos Alcaraz in three sets.{{cite web|url=https://www.theguardian.com/sport/2023/may/07/carlos-alcaraz-retains-madrid-open-against-struff-for-fourth-title-of-2023|title=Carlos Alcaraz wins Madrid Open against Struff for fourth title of 2023|website=The Guardian|date=7 May 2023|access-date=9 May 2023|archive-date=9 May 2023|archive-url=https://web.archive.org/web/20230509092344/https://www.theguardian.com/sport/2023/may/07/carlos-alcaraz-retains-madrid-open-against-struff-for-fourth-title-of-2023|url-status=live}} As a result he moved back into the top 30 in the rankings at a new career high ranking of No. 28 and became the German No. 1 ahead of Alexander Zverev following the Rome Masters on 22 May 2023. Despite this, he lost to Jiří Lehečka in the first round of the French Open.

Struff reached his second final of the season in Stuttgart after beating Zhang Zhizhen, 7th seed Tommy Paul, Richard Gasquet and top seed Hubert Hurkacz. He lost to Frances Tiafoe in 3 sets in the final despite holding a championship point in the third set. As a result, he entered the top 25 at world no. 21 at the end of the week. Struff then played in Halle, where he beat Roman Safiullin before losing to eventual champion Alexander Bublik. He announced that due to an injured hip, he would not play in Wimbledon. Eventually he also skipped the next Major, the US Open. After a three months break he returned to the Asian swing at the Zhuhai Championships where he lost to eventual finalist Yoshihito Nishioka in the quarterfinals. He won his first round match, snapping a four-match losing streak, at the Swiss Indoors in Basel defeating Christopher Eubanks.{{cite web|url=https://www.atptour.com/en/news/struff-basel-2023-monday|title=Murray Handles Hanfmann Challenge In Basel - Struff defeats Eubanks|website=ATP Tour|date=23 October 2023}} At the Sofia Open, he reached his 12th career semifinal defeating Fabian Marozsan.{{cite web|url=https://www.tennisnow.com/News/2023/November/Mannarino-Fends-Off-Ofner-for-Fourth-Semifinal-in.aspx|title=Mannarino Fends Off Ofner for Fourth Semifinal in Sofia|website=Tennis Now|date=9 November 2023}}

Struff ended the year ranked No. 25 and was awarded the ATP Comeback Player of the Year for his performance in 2023.{{cite web|url=https://www.atptour.com/en/news/struff-atp-awards-2023-comeback-player-of-the-year|title=Bouncing Back, Struff Wins Comeback Player Of The Year In 2023 ATP Awards|website=ATP Tour|date=13 December 2023}}

Struff began his year in Hong Kong, beating Marin Čilić in 3 tiebreak sets after saving 7 match points before losing, again in 3 tiebreak sets, to Sebastian Ofner in the second round. As the 24th seed, he won his first match in 6 years at the Australian Open, beating Rinky Hijikata in 5 sets, but lost to Miomir Kecmanović in the second round.

In Rotterdam, Struff reached the round of 16, defeating Alejandro Davidovich Fokina,{{cite web|url=https://www.atptour.com/en/news/struff-rotterdam-2024-feature|title=Struff on 2023: 'I was up & then went back down to earth'|website=ATP Tour|date=12 February 2024}} before losing to Emil Ruusuvuori. At his next tournaments, Struff had less success in singles, losing in the first round of Doha to Christopher O'Connell and in Dubai Tennis Championships to Hubert Hurkacz. However, he won his second ATP 500 doubles title at the Dubai Tennis Championships with Tallon Griekspoor.{{cite web|url=https://www.atptour.com/en/news/dubai-acapulco-santiago-2024-week-9-doubles|title=Griekspoor/Struff, Nys/Zielinski Claim 500s|website=ATP Tour|date=2 March 2024}}

He made a back-to-back appearance in the third round of Indian Wells, where he beat Borna Ćorić but lost to Jannik Sinner. In Miami, he defeated Daniel Altmaier but lost to Alex de Minaur.

In the beginning of the clay court season in Monte-Carlo, he reached the third round by defeating Sebastián Báez and Borna Ćorić before again losing to Jannik Sinner.

In Munich, as the fourth seed, Struff beat two-time defending finalist Botic van de Zandschulp, Félix Auger-Aliassime and two-time defending champion Holger Rune to reach his fourth career final. At age 33, Struff won his first ATP singles title by beating third seed Taylor Fritz in straight sets in the final, becoming the third oldest first-time champion since the inception of the ATP Tour in 1990, after Paolo Lorenzi and Víctor Estrella Burgos, and the first since Lorenzi in 2016 Kitzbühel.{{cite web|url=https://www.atptour.com/en/news/struff-munich-2024-first-time-winner-spotlight|title=First-Time Winner Spotlight: Jan-Lennard Struff|website=ATP Tour|date=21 April 2024}} He also reached the final of the doubles event, partnering Andreas Mies, where he lost to Yuki Bhambri and Albano Olivetti.{{cite web|url=https://www.atptour.com/en/news/fritz-struff-munich-2024-sunday-final|title=Superb Struff downs Fritz in Munich for first ATP Tour title|website=ATP Tour|date=21 April 2024}}

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Current through the 2025 Bavarian Championships.

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Current through the 2025 Bavarian Championships.

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Struff is a power baseliner type player, frequently making use of serve and volley as well. He possesses a strong serve along with a heavy forehand and solid backhand. When he plays well he can dictate play from the back of the court and hit winners from the forehand and backhand side. He also has a solid volley.

• Struff has a 12–45 record against players who were, at the time the match was played, ranked in the top 10.{{cite web|url=https://www.atptour.com/en/players/jan-lennard-struff/sl28/atp-win-loss|title=Jan-Lennard Struff – ATP Win/Loss|website=ATP Tour|access-date=2023-08-10|archive-date=2023-08-10|archive-url=https://web.archive.org/web/20230810231717/https://www.atptour.com/en/players/jan-lennard-struff/sl28/atp-win-loss|url-status=live}}

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{{Portal bar|Tennis|Biography|Germany}}

• {{ATP}}
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• [http://janlennardstruff.com/ Official website]

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|before = {{flagicon|CRO}} Borna Ćorić

|after = {{flagicon|ITA}} Matteo Berrettini

|title = ATP Comeback Player of the Year

|years = 2023

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{{Top male singles tennis players by country|GER}}

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Category:1990 births

Category:Living people

Category:German male tennis players

Category:Olympic tennis players for Germany

Category:Tennis players at the 2016 Summer Olympics

Category:Tennis players at the 2020 Summer Olympics

Category:Tennis players at the 2024 Summer Olympics

Category:Tennis players from North Rhine-Westphalia

Category:21st-century German sportsmen